This story was originally published on Healthcare Dive. To receive daily news and insights, subscribe to our free daily Healthcare Dive newsletter. UnitedHeath, the largest health insurer in the U.S., plans to return profits made in the Affordable Care Act exchanges this year back to its customers. The news, buried in written testimony CEO Stephen Hemsley plans to make in front of Congress tomorrow, comes as legislators in Washington consider policies to make healthcare more affordable — some of which co ...